Legal analysis: the number of the loan contract refers to the number of the loan, and the loan is a written certificate indicating the relationship between creditor's rights and debts. Generally written and signed by the debtor, indicating that the debtor has owed the creditor the amount indicated on the IOU. The loan contract number is set for the convenience of contract management, which has nothing to do with the contract content and has no influence. Therefore, whether there is a contract number or not does not affect the legal effect of the contract.

Legal basis: Article 667 of the Civil Code of People's Republic of China (PRC) is a loan contract in which the borrower borrows money from the lender, returns the loan at maturity and pays interest.